Valve.



J. W. GAMBLE.

VALVE.

APPLICATION FILED FEB. 1. 1913.

1,152,017. Patented Aug. 31, 1915.

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UNITED srn'rns r onricn.

JosErn w. GAMBLE, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JOSEPH s. -L-OVERING WHAETON, WILLIAM s. HALLOWELL, AND Joint o. JoNEs, ALL or PHILADELPHIA,-'PENNSYLVANIA, frnanrivsns FIRM or HARRISON SAFETY BOILER wonKs, OF PHILADELPHIA, PENNSYLVANIA.

VALVE.

Specification of Letters Patent. 7 Patgnted Ang 131, 1915 Application filed February 1, 1913. Serial No. 745,597.

To all whom it may concern:

Be it known that I, Josnri-r W. GAM LE, 1

rcturn valves under conditions in which thedifferential of the pressures acting on the opposite sides of the'valve is slight, such as is the case, for instance, with valves employed to control the air vents from chambers of condensers or open water heaters in which a steam pressure in the neighborhood of atmospheric pressure is normally maintained.

The object of my present invention is to provide a valve for the purpose specified which is simple and relatively inexpensive in construction and reliable in operation, and is adapted to respond freely and fully to slight changes in the resultant pressure acting on it. g

The various features of novelty which characterize my invention, are pointed out with particularity in the claims annexed to and forming a part of this specification.

For a better understanding of my invention, however, and of the advantages possessed by it, reference should be had to the accompanying drawings and descriptive matter, in which I have illustrated anddescribed forms in which my invention may be embodied.

Of the drawings: Figure 1 is a sectional elevation of a preferred embodiment of my invention. Fig. 2 is a sectional-elevation of the valve'shown in Fig. 1. Fig. 3 is a plan of the valve shown in Figs. 1 and 2, with parts broken away and removed. Fig. 4 is a perspective view of a portion of one of the valve disks and the resilient support therefor employed in Figs. 1, 2 and 3; and Fig. 5 is a view taken similarly to Fig. 4-, showing a modified construction.

The particular valve structure shown in Figs. 1 to 4, inclusive, comprise a casing formed of a lower part A and an upper part B. A represents the inlet opening into the valve casing, and B the, outlet opening thererrom. A: represents the valve seats surrounding the two ports A formed in the diaphragm member A separating the casing parts A and. B. As shown each port A3 is divided into four similar rectangular portions by ribs A. .The upper edges of the ribs A are flush with and may be regarded as forming Parts of the valve seats A. 'lhc two valve disks C or valve members proper, each controlling one of the ports A are and resilient sheet of material, such as phosphor bronze, and being provided at its center with means whereby the valve disk may be loosely connected to the resilient" support for the valve disk. As shown, the resilient support for each valve disk comprises a spring D partially bent aboutand secured atone end to ashaft E journaled'in the casing part B. The end of each spring remote from the shaft E is bent at D to form a loose sleeve-like bearing surrounding a pintle C securedat its ends in brackets C which are soldered or otherwise secured to the corresponding valve disk at the center of gravity of the latter.

With the construction described it will be apparent that by angularly adjusting each.

shaft E, the spring tension exerted on the valve disk may be varied, and it is also pos-- sible to lift the valve disk'well above, the valve seat by rotating the shaft 'E. To permit the resilient supports, for the two valve disks of the particular "construction shown to be simultaneously adjusted, the'two shafts E carry, externally of the valve casing, spur gears F meshing with one another, and one of the shafts E is provided with a handle G. A locking pin H adapted to pass through an aperture formed in the handle G and to enter any one of a series of aperturesI-I formed in the face of a lug B carried by the casing part B forms a means by which the shafts E may be locked in their adjusted positions.

Vith the construction described it is apparent that the relative light weight and small moment of inertia of each valve disk C and its resilient support and the practically complete freedom from frictional resistance to the movement of the valve disks c5 alike,'each comprising a somewhat flexible toward and away from their seats permits the valve disks to be very sensitive in operation, and to respond freely and fully to eX- tremely slight variations in the pressures to which they maybe exposed. The flexible character of the valve disks insure their proper seating even when of relatively large areas. l/Vhile the valve construction described is not limited to any particular valve disk dimensions, each port A in the particular type of valve shown in Figs. lto 4: will ordinarily be not less than siX inches square. The ribs A4 form supports preventing undesirable fleXure of the valve disks when the inlet pressure falls substantially below the outlet pressure. with the construction described the loose connection between each resilient supporting arm D and the corresponding valve disk permits the latter all thefreedom necessary for its proper seating and at the same time avoids friction. Moreover, this connection insures the general parallelism of the sides of the valve disk 0 to the sidesof the valve seat necessary when the valve disk and seat are rectangular, as shown in Fig. 3. When the valve disk is circular, and it is therefore unnecessary to prevent'the rotation of the valve disk about its central axis, I may employ such a loose connection between the valve disk and its support as is shown in Fig. 5, where the valve disk C C is provided on one side with a central post C to the free end of which a collar or abutment C is secured. In this construction the supporting arm D D is formed with an aperture D at its free end loosely receiving the post C While, in accordance with the provisions of the statutes I have illustrated and de scribed the best forms of my invention now known vto-me, it will be apparent to those skilled in the art that changes may be made inthe form of the-apparatus disclosed without departing from the spirit of my invention; for instance, more than one valve disk may be connected to a. single shaft E when conditions make this desirable. Under some conditions certain features of my invention may be used without a corresponding use of other features.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A valve of the character described comprising a member formed with valve seat, a sheet metal valve disk adapted to seat thereon, and a yielding. support for and loosely connected to the valve disk at the center of the latter. I

2. A valve of the character described comprising'a valve seat, a sheet metal valve disk adapted to seat thereon, and a resilient support-ing arm, one. end of which is loosely connected to the valve disk at the center of the latter.

A valve of the character described comprising a valve seat, a sheet metal valve disk adapted toseat thereon, a resilient supporting arm one end of which is loosely connected to the valve disk at the center of the latter, and an adjustable support to which the other side of said arm is connected.

at. A valve of the character described comprising a member formed with two ported valve seats, a pair of sheet metal valve disks one for and adapted to seat on each of said seats, a pair of shafts, two spring arms secured at one end, one to one and the other to the second of said shafts, and loosely connected at the other end, one to the center of one and the other to the center of the second of said valve disks, gearing connecting said. shafts whereby they may be simultaneously rotated to vary the tension of said spring arms and to lift said valve disks away from said valve seats, and means for securing said shafts in difierent angular adjustments. I

, JOSEPH W. GAMBLE. "Witnesses:

ARNOLD Kacrz, D. STEWART.

Copies of this patent may be obtained for'five cents each, by addressing the Commissioner of Patents, -Washington, D. O. 

